全文获取类型
收费全文 | 88734篇 |
免费 | 3537篇 |
国内免费 | 33篇 |
专业分类
92304篇 |
出版年
2020年 | 908篇 |
2019年 | 1180篇 |
2018年 | 1563篇 |
2017年 | 1663篇 |
2016年 | 1743篇 |
2015年 | 1256篇 |
2014年 | 1497篇 |
2013年 | 6763篇 |
2012年 | 2769篇 |
2011年 | 2908篇 |
2010年 | 1819篇 |
2009年 | 1812篇 |
2008年 | 2559篇 |
2007年 | 2606篇 |
2006年 | 2384篇 |
2005年 | 2097篇 |
2004年 | 1947篇 |
2003年 | 1847篇 |
2002年 | 1950篇 |
2001年 | 2769篇 |
2000年 | 2688篇 |
1999年 | 2060篇 |
1998年 | 1011篇 |
1997年 | 903篇 |
1996年 | 896篇 |
1993年 | 830篇 |
1992年 | 1770篇 |
1991年 | 1606篇 |
1990年 | 1623篇 |
1989年 | 1460篇 |
1988年 | 1473篇 |
1987年 | 1412篇 |
1986年 | 1481篇 |
1985年 | 1448篇 |
1984年 | 1280篇 |
1983年 | 1168篇 |
1982年 | 848篇 |
1981年 | 825篇 |
1979年 | 1371篇 |
1978年 | 984篇 |
1975年 | 1093篇 |
1974年 | 1188篇 |
1973年 | 1314篇 |
1972年 | 1084篇 |
1971年 | 1015篇 |
1970年 | 905篇 |
1969年 | 983篇 |
1968年 | 1214篇 |
1967年 | 1107篇 |
1966年 | 917篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
Microcomputer-assisted relaxation 总被引:1,自引:0,他引:1
The present pilot study was designed to test the effectiveness of a microcomputer program developed by the authors to induce relaxation and focused attention, which are common to most clinical stress-reduction and hypnotic procedures. A nonclinical sample of 20 adults used the program on an APPLE IIc computer in two 30-min. sessions in a within-subjects design. Repeated measures analyses of variance showed significant decreases in the Spielberger State Anxiety Scale and on a visual analog anxiety scale. Limitations and implications of the study are discussed. 相似文献
992.
D J Falcone 《Perceptual and motor skills》1985,61(2):651-657
The purposes of this study were (1) to replicate a right visual-field advantage for a version of the Embedded Figures Test modified for tachistoscopic presentation and (2) to test for a relationship between field independence and performance on modified Embedded Figures Test items presented to the right visual-field. 34 right-handed subjects were presented Embedded Figures Test items to the left, center, and right visual-fields for 150 msec. The Group Embedded Figures Test was also given. Results showed a right visual-field advantage on the modified embedded-figures test and (2) a negative relationship between Group Embedded Figures Test performance and right visual-field scores. These findings were discussed in terms of the differences between the two versions of the embedded-figures test, memory for simple figures, specificity of judgment, and sustained versus tachistoscopic perception. A tentative conclusion suggests that a better internal representation of the briefly presented complex figures places field-independent subjects at a disadvantage on the modified version of the test. 相似文献
993.
This project studied the effects of weather variables and size of the population on minor and major violence rates within six prisons in the Kingston, Ontario, Canada area from January, 1980 through December, 1983. While weather variables have been studied in relation to mood changes within the general population, this study was the first to analyze the impact of weather variables on rates of violence within the prison setting using forward inclusion multiple regression. Analysis showed that population size consistently appeared positively correlated with assaults on other inmates among the male medium-security prisoners during the summer months. In the summer months, temperature tended to be positively related to some minor kinds of offenses, but in the winter months the relationship was negative. Humidity, rain, sunshine hours, snow, and snow on the ground were not consistently related to incidences of minor and major violence. Indices of geomagnetic disturbances had statistically significant inverse relationships with attempted suicide/self-inflicted injury rates among the male prisoners during the summer months. Over 12 months, wind was generally negatively correlated with incidences of major and minor violence among the male inmates. For 6-mo. periods, wind was generally positively correlated with violence rates during the winter months and negatively correlated during the summer months among the male inmates. The findings relating weather variables to violence rates in the women's prison were consistently in opposition to those found for male prisoners during the 4-yr. period. 相似文献
994.
L Tysk 《Perceptual and motor skills》1985,60(1):179-188
8 patients with hospital diagnoses of major affective disorder were studied by repeated measurements of time estimation using the three different methods of metronome adjustment, verbal estimation and operative estimation (production) of short time intervals. Retrospective estimations of longer intervals were also studied. The diagnoses were evaluated according to DSM III criteria. The degree of mental disturbance was rated with subscales of the Comprehensive Psychopathological Rating Scale. Earlier findings had indicated that manic patients tend to overestimate short time intervals and that some depressed patients underestimated time, but some investigators have reported different results. A longitudinal study could possibly support the earlier findings if the time estimations should vary with the clinical states of the patients. Such a variation was suggested by the results of 5 of the 8 patients. In several cases there were statistically significant correlations between the results of time estimations and the rating scores. This partly supports earlier findings. Associations between time estimations and changes in clinical state seem to be present in some cases of major affective disorders. Operative estimations were best correlated with ratings in most cases. 相似文献
995.
S J Dollinger 《Perceptual and motor skills》1985,61(1):83-86
A paradoxical instruction was used to treat a 10-yr.-old boy's complaint of crying when unable to sleep and the daytime equivalent of fearing the public display of crying when failing at sports performances. The instruction resolved both the sleep disturbance and the public crying. The results suggest that, like adults, children may experience anxiety about sleep difficulties and that paradoxical intention may have promise for the treatment of some children's insomnia. 相似文献
996.
40 women were taught to use self-statements to cope with pain caused by ice water. The trainer used four different strategies for reassigning a homework task of using self-statements to cope with pain produced by immersing one hand in ice water. The strategies were equally effective in eliciting compliance with the homework assignment. 相似文献
997.
The relationship between cognitive style and illusion magnitude was examined using the assimilation and contrast Delboeuf distortions. As in previous research, field dependence correlated positively with assimilation; however, a significant negative correlation with contrast was also found, suggesting that, while field dependence may involve the illusory integration of the stimulus field, field independence may involve its equally illusory differentiation. 相似文献
998.
999.
1000.